add tbd note

Author: PatrickFarley

articles/search/cognitive-search-custom-skill-form.md

@@ -32,6 +32,8 @@ You'll need to train a Form Recognizer model with your input forms before you us
 
 Clone the [Azure Search Power Skills](https://github.com/Azure-Samples/azure-search-power-skills) GitHub repository to your local machine. Then navigate to **Vision/AnalyzeForm/** and open _AnalyzeForm.csproj_ in Visual Studio. This project creates an Azure Function resource that fulfills the [custom skill interface](cognitive-search-custom-skill-interface.md) and can be used for Azure Cognitive Search enrichment. It takes form documents as inputs, and it outputs (as text) the key/value pairs that you specify.
 
+<!-- TBD you don't change those variables, you add debug env variables to the project -->
+
 Open _AnalyzeForm.cs_ and make the following changes.
 * Set the `formsRecognizerApiEndpoint` variable to your resource endpoint.
 * Set `formsRecognizerApiKeySetting` to your resource's key value.